Leonardo DiCaprio

The once -- and perhaps future -- First Couple have elevated celebrity politics to unprecedented levels, using it for their own benefit while adding to the clout of celebrities who have no particular expertise but great drawing power.

Actor Leonardo DiCaprio made a brief appearance at the United Nations on Tuesday, outlining the risks of climate change in a short speech that implored leaders to take definitive action in what he said is 'not a partisan debate'

Actor Leonardo DiCaprio has nominated Prime Minister Stephen Harper to do the ice bucket challenge.
DiCaprio was in northern Alberta last week visiting the oilsands to do research for an environmental documentary.